Bolt and nut lock.



M. W. SMITH.

BOLT AND NUT LOOK.

APPLICATION FILED MAB. 6, 1909.

944,288, Patented Dec. 28, 1909.

I ll '14 llli l m/Mugs we L UNITED STATES MERRI'IT W. SMITH, OF

BOLT AND TROY, PENNSYLVANIA.

NUT LOCK.

944,288. Specification of Application filed March 6,

To all whom it may concern:

Be it known that I, MERRITT W. SMITH, of Troy, in the county ofBradford, and in the State of Pennsylvania, have invented a certain newand useful Improvement in Bolt and Nut Locks, and do hereby declare thatthe following is a full, clear, and exact description thereof.

My invention relates to an improvement in bolt and nut locks.

The bolt and nut lock which constitutes an embodiment of my inventionmay be applied to bolts or nuts of any character upon a structure of anykind. I have, as a matter of fact, however, found my nut lock especiallyadvantageous in securing the bolts or nuts in place which are used uponjournal boxes; for example, the journal boxes used upon a pitman.

By the use of my nut look, I am able to hold a bolt or nut in anyadjusted position under a very great pressure, so as to prevent itsmoving to any degree whatever when once the locking member has beentightened. At the same time the parts are such that very little movementof the tightening means is required in order to loosen the parts topermit a readjustment of the bolt or nut.

The bolt or nut lock can be readily applied, if desired, to a bolt ofthe ordinary type Without any change in the structure of the bolt.

I have shown one embodiment of my invention in the accompanyingdrawings, in which,

Figure 1 is a side elevation of a pitman equipped with my nut lock;Figs. 2 and 3 are elevations of bolts to which my nut lock may beapplied; Fig. 4 is an elevation of the nut to which my bolt and nut lockmay be applied; and Fig. 5 is a plan view of the nut lock itself.

In the drawings, 17 is a pitman having bolts 8 extending into the samefor securing the journal boxes thereof together. The bolts 8, as shownin Fig. 1, are retained in any adjusted position by means of a bolt andnut lock 1. The bolt and nut lock 1 comprises a strap 16, carrying ateach end a split ring 15, each of which rings is pro- Letters P tenPatented Dec. 28, 1909.

1909. Serial No. 481,613.

1 vided with a pair of screw-threaded extensions 2 for receiving a screw3. The bolt 8 may be constructed as shown in Fig. 2, or as shown in Fig.3.

The modification shown in Fig. 2 comprises a squared head or tighteningmember 10, a cylindrical extension 11, and a screwthreaded shank 12. Themodification shown in Fig. 3 comprises a similar squared head ortightening member and screw-threaded shank, but is provided with nocylindrical extension other than the unthreaded portion of the bolt 9.In Fig. 1 I have shown a nut to which my bolt and nut lock may beapplied. This comprises a squared head or tightening member 13, and acylindrical extension 14 similar to the corresponding parts described inconnection with Fig. 2.

My bolt and nut lock operates very simply. The bolts or nuts which arereceived in the split rings are tightened in their proper position. Thescrews 3 are then tightened so as to bring the ends of the extensions 2of the split rings 15 together, thereby tightening the split ringsaround the cylindrical portions of the bolts or nuts. When so tightenedthe frictional contact between the split rings 15 and the cylindricalextensions of the bolts or nuts will effectively prevent the latter frombecoming untightened.

While I have described my invention above in detail, I wish it to beunderstood that many changes may be made therein without departing fromthe spirit thereof.

I claim In a device of the character described, the combination of aplurality of screwthreaded shanks, a tightening member for tighteningeach of said shanks in its holding position, a cylindrical memberattached to each said tightening member, and an expansible ring lockadapted to cooperate with each of the cylindrical members to prevent itfrom turning, said expansible rings being connected together.

In testimony that I claim the foregoing I have hereunto set my hand.

MERRITT W. SMITH.

Witnesses:

H. MITCHELL, MARTHA R. MITCHELL.

